Termografia e ultrassonografia Doppler do plexo pampiniforme e termografia do escroto de touros: correlação com a qualidade do sêmen

• Ano de defesa: 2014
• Autor(a) principal: Portugal, Elói dos Santos [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Bovino; Touro; Doppler, Ultrassonografia; Termografia; Semen; Thermography
• Link de acesso: http://hdl.handle.net/11449/121877

Brazil has the largest commercial cattle herd in the world and reached 212,8 million head in 2011. 12,3 million doses of bovine semen were sold in 2012. Effective from cows of reproductive age is 61,4 million and the use of two doses of semen per cow is estimated that 10 % of the national herd is being inseminated. Fertility is an important feature in production systems and the bull has great importance. Using infrared thermography (IRT) and Doppler ultrasonography thermoregulation and blood flow were evaluated in bulls. Two groups of six bulls were evaluated for a year and the data of thermography - global temperature plexus (GTP), global temperature of the scrotum (GTE), temperature of the left plexus (TLP), temperature of the right plexus (TRP), temperature the left scrotum (TLE), temperature of the right scrotum (TRE) and Doppler ultrasonography - peak systolic velocity (PSV ), end diastolic velocity (EDV), pulsatility index (PI), resistance index (RI) and room temperature (RT) were correlated with semen analyzes. Positive and negative correlations were found between the variables of IRT and US Doppler variables of semen analyzes and concludes that IRT allows observation of early changes of the plexus and scrotal temperature; Doppler US demonstrated correlations between EDV, RI and IP with semen quality; according to this study bulls with superior quality of semen showed lower vascular impedance of the testicular arteries